Merge branch 'deprecate-default-stage'

Merge branch 'deprecate-default-stage'

* deprecate-default-stage:
  evdev: do not associate device with stage
  evdev: don't even process events without a default stage
  docs: Note default stage deprecation in README
  docs: Remove clutter_stage_get_default()
  stage: Deprecate the default stage
  script: Do not use clutter_stage_get_default()
  cally/actor: Do not use the default stage as a fallback
  Try to mop up the default stage mess
  performance/*: Do not use clutter_stage_get_default()
  interactive/*: Do not use clutter_stage_get_default()
  Merge with a11y
  micro-bench/*: Do not use clutter_stage_get_default()
  accessibility/*: Do not use clutter_stage_get_default()
  conform/*: Do not use clutter_stage_get_default()